L-Cysteine 500 mg: Antioxidants, Glutathione, Hair-Skin-Nails – Gentle Detox, Immunity and Cellular Protection

L-Cysteine 500 mg, NOW Foods is a premium supplement designed to support glutathione production – the main intracellular antioxidant – and to provide targeted support for skin, hair and nails, immune system and natural detoxification processes. The formula combines 500 mg pure L-cysteine (from 664 mg L-cysteine HCl) with vitamin C 60 mg (67% RDA) and vitamin B6 10 mg (588% RDA), three nutrients that work synergistically: cysteine provides the sulfur-containing amino acid essential for glutathione synthesis, vitamin C helps with antioxidant recycling, and B6 participates as coenzymatic factor in amino acid metabolism. The result is comprehensive support for cellular protection, oxidative stress resilience and daily vitality.

Detailed Benefits of L-Cysteine 500 mg, NOW Foods

• Supporting glutathione synthesis – the cell's antioxidant shield

Glutathione (GSH) is the "guardian" of redox balance in almost all cells. Cysteine is the limiting amino acid in GSH synthesis; when intake is adequate, the body can maintain optimal glutathione reserves.
✅ Increasing endogenous antioxidant capacity
✅ Protection against oxidative stress induced by effort, pollutants or alert lifestyle
✅ Support for cellular recovery mechanisms

• Gentle detox and metabolic balance

Glutathione is involved in natural processes of conjugation and neutralization of reactive compounds at hepatic level. By supporting cysteine availability, the formula contributes to a cleaner metabolic "background."
✅ Support for natural detoxification processes
✅ More efficient management of reactive substances resulting from metabolism
✅ Daily support without affecting energy or digestive comfort

• Hair, skin and nails – beauty from within

Cysteine is a major constituent of keratin, the protein that gives resistance to hair and nails; sulfur-rich disulfide bonds support fiber firmness and elasticity. Vitamin C contributes to normal collagen formation, synergistically complementing skin-level effects.
✅ Hair with healthier and more resistant appearance
✅ Stronger nails with reduced tendency to peeling
✅ Skin supported from within, with role for elasticity and tone

• Collagen, connective tissue and skin comfort

Together with vitamin C, cysteine supports the biochemical environment necessary for collagen synthesis and protecting it from oxidative degradation. Well-supported connective tissue means elasticity and comfort.
✅ Normal collagen formation (vitamin C)
✅ Antioxidant protection at exposed tissue level
✅ Support for skin appearance and resilience

• Immunity and coordinated antioxidant defense

Immune cells are sensitive to antioxidant status. By supporting glutathione and providing vitamin C, the formula creates favorable conditions for balanced immune response.
✅ Supporting normal immune system function
✅ Contributing to reducing oxidative stress at immune cell level
✅ Support during seasonally demanding periods

• Respiratory comfort and mucosal balance

Better antioxidant status can support respiratory environment, especially during periods with increased exposure to irritating factors. L-cysteine, as GSH precursor, provides general help for respiratory tract comfort.
✅ Antioxidant support for respiratory epithelium
✅ Perceived comfort in cold or polluted environments
✅ Foundation for "clearer" breathing, as part of daily routine

• Support for sport, effort and recovery

Intense effort increases free radical production at muscular level. When glutathione reserves are supported, the body can better protect cellular structures and recover more efficiently after training.
✅ Resilience to effort-induced oxidative stress
✅ Supporting muscle recovery
✅ Consistent vitality for active routines

• Amino acid metabolism and vitamin B6 role

Vitamin B6 is involved in amino acid transformations and metabolic cycles of sulfur compounds. Its presence in the formula optimizes cysteine utilization and integration into biochemical processes.
✅ Metabolic efficiency in amino acid utilization
✅ Support for homocysteine balance through transsulfuration pathways
✅ Crucial cofactor for numerous enzymes involved in energy and neurotransmitters

• Clarity, focus and resilience to oxidative fatigue

Oxidative stress can influence mental "clarity" state. By supporting glutathione and providing vitamin C, the formula contributes to a biochemical background conducive to concentration.
✅ Support for daily cognitive performance
✅ Balance during periods of intense work or learning
✅ "Clean" energy sensation without overstimulation

• Intelligent synergy: L-cysteine + Vitamin C + Vitamin B6

Three pieces that complement each other: cysteine brings the essential "brick" for GSH; vitamin C regenerates other antioxidants and supports collagen; B6 optimizes enzymatic flows. This architecture makes each capsule more than a simple amino acid.
✅ Antioxidant recycling and cellular protection
✅ Structural support (keratin and collagen)
✅ Efficient utilization through metabolic cofactors

• Who it's suitable for

People with intense lifestyle, concerned about hair, skin and nail beauty, those who exercise or work in demanding environments, but also anyone who wants basic antioxidant and immune support.
✅ Long-term anti-oxidative stress routines
✅ Integrated "inside-out" beauty care
✅ Versatile supplement for wellness programs

Directions for use

Take 1 tablet 1 to 3 times daily, as needed.


 

Other ingredients

Microcrystalline cellulose, stearic acid (vegetable source), vegetarian coating, silicon dioxide, magnesium stearate (vegetable source) and citric acid.
Not manufactured with wheat, gluten, soy, milk, egg, fish, shellfish or tree nut ingredients. Produced in a GMP facility that processes other ingredients containing these allergens.

Warnings

Natural color variation may occur in this product.
Store in a cool, dry place after opening.
For adults only. Consult physician if pregnant/nursing, taking medications or have a medical condition. Keep out of reach of children.